My wife plays a lot fewer games than I do, but she'll watch me playing the story-heavy ones for enjoyment. All the drama and entertainment, with none of the button-mashing. Plus it means she can craft or knit or do basically anything while still following what I'm doing on-screen.

Also, Metal Gear Solid 2 and 4 get that much more entertaining when you're treated to an OTT rendition of 'My Heart Will Go On' everytime Rose and Jack are being whiny and melodramatic at each other.